This cage is composed of high quality steel using cold drawn seamless carbon steel. The size of these steel bars measure 40mm in diameter each. Cusco`s Safety 21 Roll Cage line-up covers more than over 300 different Japanese model vehicles. Cusco has been producing Roll Cages for over 20 years, through decades of experience these have become the best fitting out-of-the-box Roll Cages. Get this and all your JDM at RHDJapan!!